Refactor pkg/lmcli/provider

Moved `ChangeCompletionInterface` to `pkg/api`, moved individual
providers to `pkg/api/provider`

pkg/tui/views/chat/chat.go

@@ -3,8 +3,8 @@ package chat
 import (
 	"time"
 
+	"git.mlow.ca/mlow/lmcli/pkg/api"
 	models "git.mlow.ca/mlow/lmcli/pkg/lmcli/model"
-	"git.mlow.ca/mlow/lmcli/pkg/lmcli/provider"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
 	"github.com/charmbracelet/bubbles/cursor"
 	"github.com/charmbracelet/bubbles/spinner"
@@ -17,7 +17,7 @@ import (
 // custom tea.Msg types
 type (
 	// sent on each chunk received from LLM
-	msgResponseChunk provider.Chunk
+	msgResponseChunk api.Chunk
 	// sent when response is finished being received
 	msgResponseEnd string
 	// a special case of common.MsgError that stops the response waiting animation
@@ -83,7 +83,7 @@ type Model struct {
 	editorTarget    editorTarget
 	stopSignal      chan struct{}
 	replyChan       chan models.Message
-	replyChunkChan  chan provider.Chunk
+	replyChunkChan  chan api.Chunk
 	persistence     bool // whether we will save new messages in the conversation
 
 	// ui state
@@ -115,7 +115,7 @@ func Chat(shared shared.Shared) Model {
 
 		stopSignal:     make(chan struct{}),
 		replyChan:      make(chan models.Message),
-		replyChunkChan: make(chan provider.Chunk),
+		replyChunkChan: make(chan api.Chunk),
 
 		wrap:            true,
 		selectedMessage: -1,